Boosting Developer Productivity: Introducing Domain Checker Skill
What’s the first thing you consider when starting a new project? The “domain name,” of course.
What if your most desired name is already taken in .com or .ai? Have you visited whois sites one by one each time?
I did too. So I built a solution.
The Problem: Repetitive Domain Search Tasks
If you’re a startup founder or developer, you’ve likely faced this situation:
- Desired domain is already registered
- Visit 10 different whois sites
- Manually create comparison table in Excel
- Brainstorm alternative domain names
This process wastes time and drains creativity through repetitive work.
The Solution: Domain Checker Skill
Domain Checker is a skill for Claude Code that checks domain availability in real-time and compares costs.
Key Features
| Feature | Description |
|---|---|
| Fast Parallel Lookup | Check 8 major TLDs simultaneously |
| 3-Stage Fallback | RDAP → whois → DNS (ensures reliability) |
| Automatic Alternative Suggestion | Auto-discovers alternatives when all desired domains are taken |
| Cost Comparison Table | Shows annual cost and minimum contract period by TLD |
| Markdown Report | Automatically generates detailed result reports |
Usage
# Basic lookup
/domain-checker myapp
# Result example
🔍 Domain Search: myapp*
🔴 myapp.com (~$13/year)
🔴 myapp.ai (~$75/year)
🟢 myapp.io (~$38/year) ← Available!
Target TLDs
| TLD | Annual Cost | Min Contract | Characteristics |
|---|---|---|---|
| .com | ~$13 | 1 year | General, highest recognition |
| .ai | ~$75 | 2 years | AI project specialized |
| .io | ~$38 | 1 year | Tech startup preferred |
| .net | ~$14 | 1 year | .com alternative |
| .co | ~$28 | 1 year | Startup popular |
| .dev | ~$13 | 1 year | Developer targeted |
| .tech | ~$12 | 1 year | Tech-related, low cost |
| .app | ~$14 | 1 year | App service specialized |
Technical Details
3-Stage Fallback Mechanism
1. RDAP API → Most accurate, fast
2. whois CLI → Fallback when RDAP fails
3. DNS NS lookup → Last resort
Alternative Domain Suggestion
When all major domains are registered, automatically discovers alternatives:
Search Patterns:
- Prefixes:
get,try,use,go,my,the - Suffixes:
hq,app,hub,lab,pro
Example: myapp → getmyapp.ai, myapp-hq.io, trymyapp.com
Asynchronous Parallel Processing
Uses Python async programming to check 8 TLDs simultaneously, delivering results within 2 seconds.
Real Usage Example
/domain-checker ai
Result:
# 🌐 Domain Search Report: `ai`
## Summary
| Item | Result |
|------|--------|
| Search Domain | `ai` |
| TLDs Checked | 8 |
| 🟢 Available | **0** |
| 🔴 Already Registered | 8 |
## 💡 Alternative Domain Name Suggestions
Domains available among variations of `ai`.
| Domain | Annual Cost | Notes |
|--------|-------------|-------|
| `ai-hq.ai` | ~$75/year | AI specialized (min 2-year contract) |
| `ai-hq.io` | ~$38/year | Tech startup preferred |
GitHub Release
This skill is released as open source.
🔗 GitHub: https://github.com/yarang/skill-domain-checker
Installation
git clone https://github.com/yarang/skill-domain-checker.git
cp -r skill-domain-checker ~/.claude/skills/domain-checker
Business Value
| Aspect | Improvement |
|---|---|
| Time Savings | 90% reduction in domain search time (10 min → under 1 min) |
| Cost Efficiency | Supports optimal selection through TLD comparison |
| Documentation | Easy team sharing with auto-generated reports |
| Productivity | Focus on core problems by automating repetitive tasks |
Conclusion
Domain Checker is more than a simple domain search tool. It’s a productivity tool that helps developers and entrepreneurs escape repetitive tasks and focus on truly important problems.
By solving small daily inconveniences with AI and automation, we can create greater value.
Related Projects:
- server-status-checker - SSH config-based server status checker
Tags: #DevTools #OpenSource #Claude #AI #Productivity #Domain
Korean Version: 한국어 버전